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Plumbing education, information, advice, help and suggestions are provided by some of the most experienced plumbers who wish to "give back" to society. Since 1996 we have been the best online (strictly) PLUMBING advice site. If you have questions about plumbing, toilets, sinks, faucets, drains, sewers, water filters, venting, water heating, showers, pumps, and other strictly PLUMBING related issues then you've come to the right place. Please refrain from asking or discussing legal questions, or pricing, or where to purchase products, or any business issues, or for contractor referrals, or any other questions or issues not specifically related to plumbing. Keep all posts positive and absolutely no advertising. Our site is completely free, without ads or pop-ups and we don't tract you. We absolutely do not sell your personal information. We are made possible by: 
| Re: drain line question |
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Author:
steve (CA)
No code that I'm aware of. Roof drains often run through the interior of commercial buildings and houses built on property lines. |
| Re: drain line question |
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Author:
NP16 (OR)
It might be loud during a rain storm. Installing cast iron pipe instead of ABS plastic may lessen the noise. |
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